Method of making punches



May 6, 1924. 7 1,492,837 R. H. DIERSTEIN 5 vMETHOD OF MAKING PUNCHES Filed June 5. 1922 12.12117 zleraikein INVENTOR all Patented May 6, 1924.

TUNITED STATES ROY HENRY DIERSTEIN, or FORT WAYNE, INDIANA} nn'rnoni OF MA ING ru1\T -IEs.

7 Application filed was 5,

To all whom itmay 00mm: 1

Be' it known that I, ROY HENRY Drun STEIN, a citizen of the'United States; residing at Fort Wayne, in the county of Allen and State of Indiana, have invented new and useful Improvements in Methods of Making Punches, of which the following is a specification. p

This invention relates'to armature and stator lamination punches, and has for one of its chief characteristics, the provision of a newandimproved method" of producing such punches with a consequent reduction of time, labor, and cost of manufacture.

It is an old and well known method in producing punches of the above-mentioned character, to arrange the punches in a die or plate, which was first filed out and made as near an exact duplicate of the die as possible. After filing this plate to produce the necessary slot, the tedious process of lining up began, and after the punches had been driven into the slots, it was frequently necessary to turn them around to the proper place. The work involved in this process constitutes approximately fifty per cent of the entire flat labor cost of the die production, and it is with a view of eliminating this apparently unnecessary labor and expense that I have devised the present invention.

Another object of the invention resides in the provision of a punch of the above-mentioned character, which possesses the desired strength and rigidity, eliminating die breakage usually due to punches coming loose.

The nature and advantages of the invention will be better understood when the following detailed description is read in connection with the accompanying drawings, the invention residing in the construction,

combination, and arrangement of parts as claimed.

In the drawing forming part of this application, like numerals of reference indicate similar parts in the several views wherein:

Figure 1 is a view of the plate showing the punches positioned in the slot;

Fig. 2 is a somewhat similar view partly in section showing the other parts of the punch assembled prior to welding;

Fig. 3 is a plan view of the die plate; and

Fig. 4 is an enlarged view partly in section of the punch in its entirety.

In accordance with the improved method 1922. serial 1%. 566,081.

of producing the punches above'referred to, {I

I employ a die plate 10 which is provided with the proper number 'and sh'ape ofopen- IIIgS o1 slots 11. The punches indicated at around the'inside of these punches as c learly illustrated in the drawing. This plate is beveled about its upper edge for welding,

and is'u's'ed't'o prevent shrinkiiig in ofthe punches, and to fu'rtlier assist in holding the punches in proper position. A temporary ring 15 is bolted or otherwise suitably secured to the die plate 10, being formed with an attaching flange 16 for this purpose. This temporary ring 15 is arranged in spaced concentric relation to the punches 12, and is extended at its'upper end to provide an annular flange 17. The ring 15 is used to hold the punches in an upright position, the punches beingsingly clamped in an upright position at which time each punch is spotwelded in place. An inverted substantially U-shaped clamp 18 is used for this purpose, one end of the clamp reposing upon the particular punch to be welded, while the other end bears against the flange 17 of the ring 15. The upper edge of the ring proper is provided with a circumferential series of threaded openings 19 to accommodate a fastening bolt 20 which is utilized to hold the clamp 18 associated with the ring 15 and the particular punch to be welded, in the manner shown in Fig. 1. After each punch is spot-welded in place, the clamp is removed and associated with the next punch in the manner above described, and after all the punches have been welded in place, the clamp 18 is removed. A permanent ring 14 is then arranged in concentric relation about the punches, and in spaced relation to the flange 17 within which the permanent ring is positioned. This permanent ring is spotwelded, on the outside of the punches, after which all the remaining openings are covered by welding material. The temporary ring 15 is then removed. The steel plate 13 is arranged about five-thousandths of an inch loose, as is also the permanent ring 14, this ring of course constituting the head of the punch as a unit. The punches are thus fused together by this welding into one solid unit, with each punch inproper alinement. The punch as a unit can be easily separated from the die plate 10 and the same method pur sued in the production of any number of similar punches with a reduction of a considerable amount of labor and cost, in the production of said punches in accordance with the old method herein above outlined.

What I claim is:

1. A new and improved method of producing punches of the character described, consisting in the use of a die plate provided with a series of slots, arranging the punches at short distance in said slots, then placing a plate within the circular series of punches to prevent shrinking-in of the latter, then clamping each punch singly in a perpendicular position while each punch is spotwelded to said plate, then placing a permanent ring around the outside of said punches to provide a head for the punch, and finally welding the ring and punches together.

2. A new and improved method of roducing punches of the character descri ed,

in of the latter, then securing a temporary ring to the die plate in concentric relation to the punches,then singly clamping each punch to the temporary ring while said punch is spot-welded to the plate arranged within the confines of said punches, then arranging an additional ring about a said punches and within the temporary ring after the clamp has been removed from the latter, then welding the punches to the second-mentioned ring to provide a head for the punch, and finally removing the temporary ring from the die plate. I

In testimony whereof I affix my signature.

ROY HENRY DIERSTEIN. 

